You would refund it and move on with your life like any sane human being. Most people wouldn't hold a grudge because they got over promised and under delivered on a video game nearly a decade before.

I don't think anyone is defending the launch state of NMS in contrast to what Sean Murray was promising, but it has been pretty clear for a long time that Sean was not trained on pre-release community interaction, got caught up in the excitement of the hype-machine, and way oversold the state of the game. They have since had between 20 and 30 FREE major updates and have turned it into a decent and unique game that tons of players love.

What more do you people want?